package cn.tedu._05weibo.controller;

import cn.tedu._05weibo.common.response.JsonResult;
import cn.tedu._05weibo.common.response.StatusCode;
import cn.tedu._05weibo.mappers.UserMapper;
import cn.tedu._05weibo.pojo.dto.UserLoginDTO;
import cn.tedu._05weibo.pojo.dto.UserRegDTO;
import cn.tedu._05weibo.pojo.entity.User;
import cn.tedu._05weibo.pojo.vo.UserVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import springfox.documentation.annotations.ApiIgnore;

import javax.servlet.http.HttpSession;
import java.util.Date;

/**
 * Slf4j注解
 *   1.日志注解,添加在类上;
 *   2.在类上添加此注解后,会自动创建一个日志对象叫做log;
 * Knife4j注解：
 *   1.Api注解：设置控制器类名在Knife4j文档中显示的名称;
 *   2.ApiOperation注解：设置控制器方法名在Knife4j文档中显示的名称;
 *   3.ApiIgnore注解：Knife4j忽略此参数,不会提现到Knife4j的文档中;
 *   4.ApiModelProperty注解:
 *     4.1 添加在DTO和VO类属性上;
 *     4.2 用于调整Knife4j文档中的参数说明及描述等;
 *   5.ApiImplicitParam注解
 *     ApiImplicitParams注解
 *     对声明参数方式接收的参数进行描述;
 */
@Api(tags = "01.用户模块")
@Slf4j
@RestController
@RequestMapping("/v1/users/")
public class UserController {
    @Autowired
    private UserMapper userMapper;
    /**
     * 1.注册功能
     *  *RequestBody:Java对象 -----> JSON格式 ---->Web前端;
     *  *ResponseBody: JS对象 -----> JSON格式 ---->Java前端;
     */
    @ApiOperation("注册功能")
    @PostMapping("reg")
    public JsonResult reg(@RequestBody @Validated UserRegDTO userRegDTO){
        //soutp+回车
//        System.out.println("userRegDTO = " + userRegDTO);
        //以日志的形式打印输出
        log.debug("userRegDTO = " + userRegDTO);
        /*
            1.接收参数[已完成]
            2.数据合法性校验[暂时不做，后续用验证框架做]
            3.校验用户名是否被占用[SELECT接口]
                3.1 被占用，return 2;
                3.2 未被占用，[INSERT接口]，return 1;
         */
        UserVO userVO = userMapper.selectByUsername(userRegDTO.getUsername());
        if(userVO!=null){
            //统一响应返回结果【全参构造】
            return new JsonResult(StatusCode.USERNAME_ALREADY_EXISTS);
        }
        User user = new User();
        BeanUtils.copyProperties(userRegDTO,user);
        user.setCreated(new Date());
        userMapper.insert(user);
        return JsonResult.ok();
    }

    /**
     *2.登录功能
     */
    @ApiOperation("登录功能")
    @PostMapping("login")
     public JsonResult login(@RequestBody UserLoginDTO userLoginDTO,@ApiIgnore HttpSession session){
        UserVO userVO = userMapper.selectByUsername(userLoginDTO.getUsername());
        if (userVO==null){//用户名错误
            return new JsonResult(StatusCode.USERNAME_ERROR);
        }
        if (userVO.getPassword().equals(userLoginDTO.getPassword())){
            //登录成功
            session.setAttribute("user",userVO);
            return new JsonResult(StatusCode.LOGIN_SUCCESS);
        }
        //密码错误
        return new JsonResult(StatusCode.PASSWORD_ERROR);
    }
    /**
     * 3.获取当前用户功能
     */
    @ApiOperation("获取当前用户")
    @GetMapping("currentUser")
    public JsonResult currentUser(@ApiIgnore HttpSession session){
        UserVO userVO = (UserVO) session.getAttribute("user");
         return JsonResult.ok(userVO);
    }

    /**
     *4.退出登录
     */
    @ApiOperation("退出登录")
    @GetMapping("logout")
    public void logout(@ApiIgnore HttpSession session){
        session.removeAttribute("user");
    }
}
